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Finding the Fourth Proportional to 69,879.60, 104,811.30 and 19,967.40

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Solution

The fourth proportional to 69,879.60, 104,811.30 and 19,967.40 is: 29,948.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,879.60 : 104,811.30 = 19,967.40 : x
  2. Step 2: Convert to fraction form
    69,879.60/104,811.30 = 19,967.40/x
  3. Step 3: Cross multiply
    69,879.60x = 104,811.30 × 19,967.40
  4. Step 4: Simplify right side
    69,879.60x = 2,092,809,151.62
  5. Step 5: Solve for x
    x = 2,092,809,151.62/69,879.60
  6. Step 6: Final answer
    x = 29,948.79

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.